rs6000: fix for PR61396 (wide-int fallout)

CONSTANT_P is true for more than just all kinds of constant number.
This patch undoes that part of the wide-int patches.

From-SVN: r212932

gcc/ChangeLog

+2014-07-23  Segher Boessenkool  <segher@kernel.crashing.org>
+
+	PR target/61396
+	* config/rs6000/rs6000.c (paired_expand_vector_init): Only allow
+	constant numbers, not general constants.
+	(rs6000_expand_vector_init): Ditto.
+
 2014-07-23  Nathan Sidwell  <nathan@acm.org>
 
 	* gcov-tool.c (gcov_list): Declare here.

gcc/config/rs6000/rs6000.c

@@ -5320,7 +5320,7 @@ paired_expand_vector_init (rtx target, rtx vals)
   for (i = 0; i < n_elts; ++i)
     {
       x = XVECEXP (vals, 0, i);
-      if (!CONSTANT_P (x))
+      if (!(CONST_SCALAR_INT_P (x) || CONST_DOUBLE_P (x) || CONST_FIXED_P (x)))
 	++n_var;
     }
   if (n_var == 0)
@@ -5472,7 +5472,7 @@ rs6000_expand_vector_init (rtx target, rtx vals)
   for (i = 0; i < n_elts; ++i)
     {
       x = XVECEXP (vals, 0, i);
-      if (!CONSTANT_P (x))
+      if (!(CONST_SCALAR_INT_P (x) || CONST_DOUBLE_P (x) || CONST_FIXED_P (x)))
 	++n_var, one_var = i;
       else if (x != CONST0_RTX (inner_mode))
 	all_const_zero = false;